HMNR28D Hanbit Electronics Datasheet

HMNR28D Key Features

• INTEGRATED LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY and CRYSTAL
• BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES, and SECONDS
• AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION VOLTAGES : (VPFD = Power-fail Deselect Voltage)
• HMNR28D : VCC = 4.5 to 5.5V 4.2V ≤ VPFD ≤ 4.5V
• HMNR28DV: VCC = 3.0 to 3.6V 2.7V ≤ VPFD ≤ 3.0V
• CONVENTIONAL SRAM OPERATION : UNLIMITED WRITE CYCLES
• SOFTWARE CONTROLLED CLOCK CALIBRATION FOR HIGH ACCURACY